Photoelectric conversion device and display device comprising the same
Embodiments of a display device include a plurality of light emitting portions including a plurality of light emitting elements; and a sensing portion including a photoelectric conversion device, wherein the photoelectric conversion device includes a first electrode, common electrode facing the first electrode, and a hole injection layer, hole transport layer, resonance layer, and an active layer stacked between the first electrode and the common electrode, and wherein the light emitting elements include, a pixel electrode, the common electrode facing the pixel electrode, and the hole injection layer, hole transport layer, resonance layer, and a light emitting layer stacked between the pixel electrode and the common electrode, wherein a thickness of each of the resonance layers of light emitting elements are different from each other, and a thickness of the resonance layer of a light emitting element is the same as a thickness of the resonance layer.
1 . A display device comprising:
a plurality of light emitting portions, wherein the plurality of light emitting portions include a plurality of light emitting elements; and
a sensing portion including a photoelectric conversion device in the sensing portion, wherein the photoelectric conversion device includes a first electrode, a common electrode facing the first electrode, and a hole injection layer, a hole transport layer, a resonance layer having a thickness, and an active layer sequentially stacked between the first electrode and the common electrode, and wherein
the plurality of light emitting elements include, a pixel electrode, the common electrode facing the pixel electrode, and the hole injection layer, the hole transport layer, the resonance layer, and a light emitting layer sequentially stacked between the pixel electrode and the common electrode, wherein
a thickness of each of the resonance layers of light emitting elements configured to emit light of different colors are different from each other, and
a thickness of the resonance layer of at least one of the light emitting elements is the same as a thickness of the resonance layer of the photoelectric conversion device.
2 . The display device of claim 1 , wherein the plurality of light emitting elements include a first light emitting element configured to emit red light, a second light emitting element configured to emit green light, and a third light emitting element configured to emit blue light, and
the resonance layer includes a first resonance layer having a first thickness disposed in the first light emitting element, a second resonance layer having a second thickness disposed in the second light emitting element, a third resonance layer having a third thickness disposed in the third light emitting element, and a fourth resonance layer having a fourth thickness disposed in the photoelectric conversion device.
3 . The display device of claim 2 , wherein the first thickness is the same as the fourth thickness.
4 . The display device of claim 2 , wherein the first thickness is greater than the second thickness and the third thickness.
5 . The display device of claim 2 , wherein a distance from an upper surface of the pixel electrode of the first light emitting element to a lower surface of the light emitting layer is the same as a distance from an upper surface of the first electrode of the photoelectric conversion device to a lower surface of the active layer.
6 . The display device of claim 1 , wherein the plurality of light emitting elements further include buffer layers, electron transport layers, and electron injection layers sequentially stacked on the light emitting layers, and
the photoelectric conversion device further includes the buffer layer, the electron transport layer, and the electron injection layer sequentially stacked on the active layer.
7 . The display device of claim 1 , wherein the active layer includes a donor layer and an acceptor layer disposed on the donor layer, and
the donor layer is disposed on the resonance layer.
8 . The display device of claim 7 , wherein the donor layer has a thickness of about 100 to about 200 Å.
9 . The display device of claim 7 , wherein the acceptor layer has a thickness of about 300 to about 500 Å.